Numerical simulation of non-spherical projectiles hypervelocity impact on spacecraft shield configuration

Numerical simulations of non-spherical projectiles hypervelocity impact on single bumper shield at normal angles were carried out using the SPH(smoothed particle hydrodynamics) technique of AUTODYN hydro-codes.The results of 2D and 3D simulation were given.Effects of projectile aspect ratios with different shapes and impact orientations,etc.on characteristics of debris cloud and module-wall damage sizes produced by hypervelocity impact on shield configuration were investigated with the same mass and velocity.Simulation results were compared with the characteristic of debris cloud and module-wall damage sizes created by spherical projectiles.It is shown that a projectile has a larger aspect ratio,it has a higher perforation capability;debris cloud shapes,mass distribution,fragmentation degree and perforation capability created by non-spherical projectiles are different with various impact orientations.